[ Rhythm Reloaded ] Team 6 Progress Presentation

Team 6 Reintroduction Andy Gabler Ben Moes Nathan Brinks David van Geest

Outline I.Project Reintroduction II.Design Norms III.Medical Community Surveys IV.Microprocessor Decision V.Operating System Decision VI.Challenges VII.Progress VIII.Resources IX.Project Feasibility X.Questions

Project Reintroduction An electronic stethoscope that will: An electronic stethoscope that will: Perform the functions of a traditional stethoscope Perform the functions of a traditional stethoscope Record digital audio data from the patient Record digital audio data from the patient Reduce ambient noise Reduce ambient noise Perform frequency filtering Perform frequency filtering Store the audio files on the device Store the audio files on the device Transfer the audio files to a computer via USB Transfer the audio files to a computer via USB Contain these features in a convenient media- player like form-factor Contain these features in a convenient media- player like form-factor ReintroductionDesign NormsSurveys μ Processor OS ChallengesProgress ResourcesFeasibility

Technical Block Diagram ReintroductionDesign NormsSurveys μ Processor OS ChallengesProgress ResourcesFeasibility

Design Norms Transparency: must be easy to use, no technical experience required Transparency: must be easy to use, no technical experience required Stewardship: must protect the user, patient, and environment. RoHS, Latex Free, HIPAA Stewardship: must protect the user, patient, and environment. RoHS, Latex Free, HIPAA Integrity: must provide an accurate representation of the sounds produced by the body Integrity: must provide an accurate representation of the sounds produced by the body ReintroductionDesign NormsSurveys μ Processor OS ChallengesProgress ResourcesFeasibility

Medical Community Survey 30 participants: 30 participants: 21 nurses (70%), 2 doctors (7%), 6 students (20%), and 1 Nurse Practitioner (3%) Overall favorable response ReintroductionDesign NormsSurveys μ Processor OS ChallengesProgress ResourcesFeasibility

Medical Community Survey 78% would use the device if it was purchased for them by their employer 78% would use the device if it was purchased for them by their employer 18% Yes, 46% Unsure, 36% No, if payment required 18% Yes, 46% Unsure, 36% No, if payment required ReintroductionDesign NormsSurveys μ Processor OS ChallengesProgress ResourcesFeasibility

Medical Community Survey Average price: $150 Average price: $150 47% report hearing difficulties 47% report hearing difficulties 20% report uncomfortable earpieces 20% report uncomfortable earpieces ReintroductionDesign NormsSurveys μ Processor OS ChallengesProgress ResourcesFeasibility

Microprocessor Decision Main Criteria: Main Criteria: USB Device functionality USB Device functionality DSP Functionality (Hardware Multiply) DSP Functionality (Hardware Multiply) Power consumption Power consumption Clock Speed Clock Speed RoHS compliance RoHS compliance Minor Considerations Minor Considerations Available memory, removable media interface, GPIO, ADC, price, dev kit Available memory, removable media interface, GPIO, ADC, price, dev kit ReintroductionDesign NormsSurveys μ Processor OS ChallengesProgress ResourcesFeasibility

Microprocessor Decision First choice: Freescale Coldfire MCF5251 First choice: Freescale Coldfire MCF5251 Development Problems: Development Problems: No Ethernet on dev board No Ethernet on dev board File transfer rate over serial File transfer rate over serial Memory image conversion from binary to SREC Memory image conversion from binary to SREC Second Choice: Freescale Coldfire MCF5275 Second Choice: Freescale Coldfire MCF5275 Onboard Ethernet Onboard Ethernet Full OS support Full OS support ReintroductionDesign NormsSurveys μ Processor OS ChallengesProgress ResourcesFeasibility

OS Decision Main Criteria: Main Criteria: Hardware Support Hardware Support Open-Source Code Open-Source Code User Community User Community Documentation Documentation Code Footprint Code Footprint Familiarity to team Familiarity to team Price Price Multi-tasking Multi-tasking ReintroductionDesign NormsSurveys μ Processor OS ChallengesProgress ResourcesFeasibility

OS Decision Matrix ReintroductionDesign NormsSurveys μ Processor OS ChallengesProgress ResourcesFeasibility

Challenges Microprocessor selection Microprocessor selection Chestpiece design Chestpiece design Trivial File Transfer Protocol (TFTP) setup Trivial File Transfer Protocol (TFTP) setup IP ownership IP ownership ReintroductionDesign NormsSurveys μ Processor OS ChallengesProgress ResourcesFeasibility

Progress Received microprocessor development kit Received microprocessor development kit Compiled μClinux OS kernel (1.2 MB size) Compiled μClinux OS kernel (1.2 MB size) Booted the OS on the development board Booted the OS on the development board Compiled HelloWorld for our processor Compiled HelloWorld for our processor Ran HelloWorld under μClinux (Milestone 1) Ran HelloWorld under μClinux (Milestone 1) Received and tested various microphones Received and tested various microphones Found FIR filter source code Found FIR filter source code Received sample flash, CODEC parts Received sample flash, CODEC parts Completed first draft of PPFS Completed first draft of PPFS ReintroductionDesign NormsSurveys μ Processor OS ChallengesProgress ResourcesFeasibility

μClinux Screenshot ReintroductionDesign NormsSurveys μ Processor OS ChallengesProgress ResourcesFeasibility

Resources Francis Andries – Andries Auscultation Francis Andries – Andries Auscultation Dr. Rob “The Bossman” Bossemeyer Dr. Rob “The Bossman” Bossemeyer David Dunayczan – Freescale Semiconductor David Dunayczan – Freescale Semiconductor Dick Almay – Spansion Dick Almay – Spansion Justin Kohmescher – Analog Devices, Micron Justin Kohmescher – Analog Devices, Micron Dr. Srinivas Janardan – Grand River Gastroenterology Dr. Srinivas Janardan – Grand River Gastroenterology David Josephson – Josephson Engineering David Josephson – Josephson Engineering DornerWorks Embedded Systems Engineering DornerWorks Embedded Systems Engineering CodeSourcery CodeSourcery Prof. Randall Brouwer Prof. Randall Brouwer Prof. Steven VanderLeest Prof. Steven VanderLeest uClinux-dev, uClinux-coldfire, uClinux.org, uCdot.org, CLUG uClinux-dev, uClinux-coldfire, uClinux.org, uCdot.org, CLUG ReintroductionDesign NormsSurveys μ Processor OS ChallengesProgress ResourcesFeasibility

Project Feasibility Schedule Schedule All tasks put into Microsoft Project All tasks put into Microsoft Project Focus on crucial elements: audio components, recording, filtering, chestpiece, USB interface Focus on crucial elements: audio components, recording, filtering, chestpiece, USB interface Less focus on mechanical design, aesthetics, FDA approval Less focus on mechanical design, aesthetics, FDA approval Budget Budget Money spent thus far: $7.75 Money spent thus far: $7.75 Value of donated resources: $1500 Value of donated resources: $1500 Estimated remaining expenses: $600 Estimated remaining expenses: $600 Potential for further monetary support Potential for further monetary support Technical aspects proven in previous applications Technical aspects proven in previous applications Project is feasible Project is feasible ReintroductionDesign NormsSurveys μ Processor OS ChallengesProgress ResourcesFeasibility

Questions?